MessageBuilder in `message_builder.py` owns the full message lifecycle by accumulating conversation history and rendering the complete prompt, including system text, history, and reminders, on each turn.

Supporting contexts

Quoteverbatim

**MessageBuilder** (`message_builder.py`): Owns the full message lifecycle

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

Quoteverbatim

accumulates conversation history

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

Quoteverbatim

renders complete prompt (system + history + reminders) each turn.

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

Effective from: 7/16/2026, 11:28:02 PM